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Lecture notes 2011 (slides), pdf.file - Katedra matematiky FEL ČVUT

Lecture notes 2011 (slides), pdf.file - Katedra matematiky FEL ČVUT

Lecture notes 2011 (slides), pdf.file - Katedra matematiky FEL ČVUT

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Poznámka:<br />

ˆ f (p) = 2π ˇ f (−p)<br />

Značení a terminologie: F : f → ˆ f , F −1 : f → ˇ f<br />

Fourierova transformace a inverzní Fourierova transformace.<br />

Ff , f (t) . = ˆ f (p), F{f (t)} = ˆ f (p) .<br />

Postačující podmínka pro existenci Fourierovy transformace:<br />

∞<br />

|f (t)| dt < ∞ .<br />

−∞<br />

Pak totiž: ∞<br />

−∞ |f (t) e−jpt | dt = ∞<br />

−∞ |f (t)| dt < ∞ .<br />

Značení: L1 (R) = {f : R → C | ∞<br />

−∞<br />

|f (t)| dt < ∞} .<br />

Jan Hamhalter http://math.feld.cvut.cz/hamhalte Matematika pro Kybernetiku <strong>Lecture</strong> Notes 214 / 369

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